Acute sinusitis

Acute sinusitis with persistent or systemic (e.g. fever) symptoms

Co-amoxiclav 625mg PO 8 hourly

or 

Doxycycline 200mg PO STAT, then 100mg daily

Treatment duration: 5 days

Acute sinusitis with evidence of CNS involvement

Ceftriaxone 2g IV 12 hourly

Treatment duration: Discuss with ENT and Microbiology consultant